Thanks for the responses.
I met with the homeowner yesterday and walked the home, although I couldn't get my contractor to come out, so it was just my inexperienced eye. What I realized though is that this house needs a lot of work to bring it up to 2008 standards. It's 100 years old and looks it. It likely would need new electrical system and updated heating system. It has no AC, so it would need that. Add on top of that a full cosmetic rehab, and who know if there is any structural needs or not. I'd say rehab costs are more like $125k now as a rough estimate.
Rehabbed homes in the area have sold in the mid to upper 300s, so 350 ARV is a reasonable estimate. It could probably sell for $375. The area is slow right now though as it's a less established neigbhorhood in DC, but on the up and coming.
I would be looking to wholesale this, but think I couldn't really offer more than about $125k or so.
Unfortunately, there are no homes in the DC metro area that are sub-100k. The least expensive ARVs in the DC metro area are in the mid to high 100s (Townhomes). SFHs start around the 225 to 250k range in this area of the country.